Systemd

Systemd is an init system written by Lenart Pottering. It's main goal was to asynchronously load services, and to more easily manage service dependencies (and let it decide the load-order for services).

Documentation

github	https://github.com/systemd/systemd
official docs	https://systemd.io/

Tutorials

writing systemd services	http://unix.stackexchange.com/questions/47695/how-to-write-startup-script-for-systemd
archwiki daemons	https://wiki.archlinux.org/index.php/Daemons

Locations

/etc/systemd/system/*.service	custom system-services
~/.config/systemd/user/*.service	custom user service files
/usr/lib/systemd/system/*.service	system-services from libs
/usr/lib/systemd/user/*.service	user-services from libs
/etc/default/	service configuration files
/etc/conf.d/*	environment files

Permissions

systemctl-journal

group members can journalctl without sudo

Notes

systemd usage

systemd service syntax

systemd timer syntax

systemd troubleshooting